Where does this definition of marking ink come from?
This entry for marking ink is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is marking ink a noun, verb, or something else?
In this entry, marking ink is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.